function showUrl(value) {
	return "<a href='http://" + value + "' target='_blank'>" + value + "</a>";
}
Ext.onReady(function() {
			var store = new Ext.data.Store({
						url : "js/demo/hello.xml",
						reader : new Ext.data.XmlReader({
									record : "row"
								}, ["id", "name", "organization", "homepage"])
					});
			var colM = new Ext.grid.ColumnModel([{
						header : "项目名称",
						dataIndex : "name",
						sortable : true
					}, {
						header : "开发团队",
						dataIndex : "organization",
						sortable : true
					}, {
						header : "网址",
						dataIndex : "homepage",
						renderer : showUrl
					}]);
			var grid = new Ext.grid.GridPanel({
						renderTo : "hello",
						title : "中国Java开源产品及团队",
						height : 200,
						width : 600,
						cm : colM,
						store : store,
						autoExpandColumn : 2
					});
			store.load();
		});